Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Vintage Mercedes Forum

LinkBack Thread Tools Display Modes
Old 06-08-2006, 07:39 PM
Registered User
Join Date: Sep 2005
Posts: 15
My W108 project in only moving forward.........literally! Please help!

So I bought my first car in Sept. (W108 4.5) After some work we got it going well. It has been basically problem free up until about 2 weeks ago. Now when the car is warmed up and I shift into reverse the car stalls. And it WILL NOT start again till it has fully cooled down.

Any suggestions?

Thanx Alot,
Reply With Quote
Old 06-08-2006, 07:53 PM
Registered User
Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,226
Just a shot in the dark but how are your engine mounts? It's possible you have a suspect electrical connection which gets "tweaked" when the engine shifts position. I'd say fuel line but if it occurs immediately then I lean towards electrical.
Reply With Quote
Old 06-08-2006, 08:33 PM
Shab's Avatar
Registered Uhmpaa Luhmpaa
Join Date: Apr 2006
Posts: 177
Perhaps the dreaded neutral safety switch on the tranny. It's almost always been my misfortune that 2 electrical faults are involved. My 4.5 used to do the no start till cool routine also.
1971 280SE W108

1967 250SE W111
Rhode Island
Auf Wiedersehen
1972 280SE 4.5 (AKA Das Moneypitten)
1972 250C (Mit den zwei carburetors from hell)

"Time fly’s like an arrow, fruit flies like a banana" Groucho Marx
Reply With Quote
Old 06-09-2006, 01:49 AM
Tomguy's Avatar
Vintage Moderator
Join Date: Aug 2002
Location: near Scranton, PA
Posts: 5,102
Poor hot starts is typical of either a faulty aux air valve or maladjusted throttle plate, throttle position sensor and/or air speed screw. Make sure the throttle plate is closing completely, and make sure the throttle position sensor knows it is. After ensuring that, try backing the air speed screw off a half to a full turn (counterclockwise) to raise idle speed and prevent stalling and help hot starts. You may need to adjust the idle mixture AND the air speed screw might actually have to be turned in, BUT the faster idle will help prevent stalling at least. My 4.5 starts hot and cold in less than one half a revolution.
2018 Chrysler Pacifica Limited
1999 Chrysler 300M - 211,xxx

My Mercedes Benz 108 and 109 resource site

1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 11:29 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page